Question 447260
Freight train	40	mph					
passenger train	60	mph					
							
Freight train		04:00					
passenger train		08:00					
							
Difference in time=		04:00					
Freight train will have covered 160 miles  before passenger train starts
							
catch up distance=		160	miles				
catch up speed =		60	-40	mph			
catch up speed =		20	mph				
							
Catchup time = catchup distance/catch up speed							
catch up time=		160	/	20			
catch up time=		8	hours				

m.ananth@hotmail.ca